Studies on controlled potential coulometric determination of gallium in sodium perchlorate and sodium thiocyanate |
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Authors: | HS Sharma TK Bhardwaj SK Aggarwal |
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Institution: | a Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India b Chemistry Department, Meerut College, Meerut 250 001, India |
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Abstract: | Controlled potential coulometric (CPC) studies were carried out for developing a method to determine gallium at milligram levels, in the mixed supporting electrolyte medium (4 M NaClO4 + 0.5 M NaSCN), employing stirring mercury as a working electrode. Investigations for optimization of working electrode potentials, quantity of charge, level of background current and electrolysis time for achieving quantitative reduction of Ga(III) to Ga and its oxidation back to Ga(III), were undertaken. Effect of gallium content and interference of zinc in of gallium determination were also studied. The developed methodology was employed for the determination of gallium in pure Ga as well as in synthetic U + Ga mixture solutions. Accuracy and precision values of better than 0.5% were obtained at 1-2 mg levels. |
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Keywords: | Gallium Uranium Zinc Sodium thiocyanate Controlled potential coulometry |
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